conference, repeating their vow to stop president obama from nominating u.s. ambassador rice from becoming the next secretary of state. >> she has says this was not a pre-planned attack, why was that done? >> reporter: for weeks, the republicans have expressed their anger with rice, urging her to explain the appearances regarding the video and the protest over benghazi. >> this is in response to a hateful video. >> i have grave concerns. answers from ambassador rice before i could support her for any position. >> this president and this administration has either been guilty of colossal incompetent acts or engaged in a cover-up, neither of which are acceptable to the american people. >> reporter: also today, mueller and joyce briefed the top commanders on the scandal involving petraeus. the acting cia director, morrell, was also here for private meetings the big expectation tonight is that petraeus himself will come forward to testify about the benghazi attack, not his own troubles, as early as tomorrow or friday. now there are some differences among republican